Added basic email reporting of checksum mismatches.
Merge branch 'master' of github.com:mjordan/islandora_checksum_checker
Shortened some long lines.
Removed dependency on islandora_checksum from .info file, and updated README to recommend use of that module.
Fixed broken use of 'islandora_checksum_checker_items_per_cron'; added admin option to be emailed when all objects have been checked; updated README.txt.
Minor cleanup.
remove left over code?